CN113356969A - Automatic cleaning equipment for particle filter - Google Patents

Automatic cleaning equipment for particle filter Download PDF

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Publication number
CN113356969A
CN113356969A CN202110681436.1A CN202110681436A CN113356969A CN 113356969 A CN113356969 A CN 113356969A CN 202110681436 A CN202110681436 A CN 202110681436A CN 113356969 A CN113356969 A CN 113356969A
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China
Prior art keywords
temperature
unit
current
heating
air flow
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CN202110681436.1A
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Chinese (zh)
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CN113356969B (en
Inventor
项昶斌
张秦涛
李建臣
陈立峰
齐明武
娄立武
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Zhejiang Yinlun Intelligent Equipment Co ltd
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Zhejiang Yinlun Intelligent Equipment Co ltd
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Priority to CN202110681436.1A priority Critical patent/CN113356969B/en
Priority to PCT/CN2021/105487 priority patent/WO2022262025A1/en
Publication of CN113356969A publication Critical patent/CN113356969A/en
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Publication of CN113356969B publication Critical patent/CN113356969B/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
    • F01N3/0237—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles for regenerating ex situ
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
    • F01N3/0232—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles removing incombustible material from a particle filter, e.g. ash
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2066—Selective catalytic reduction [SCR]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

Abstract

The invention provides an automatic cleaning device for a particle filter, which is used for heating and cleaning the particle filter and is characterized by comprising the following components: a particulate filter cleaning device for cleaning the particulate filter; and a control device for controlling an operation of the particulate filter cleaning device, wherein the particulate filter cleaning device includes at least a process temperature sensor for sensing a temperature of the air flow entering the cleaning chamber as a process temperature, and the control device controls the intake valve, the heating unit, and the air flow driving unit based on the process temperature and a predetermined heat process curve so that the process temperature conforms to the predetermined heat process curve. The automatic cleaning equipment for the particle filter can quickly complete cleaning, has a good cleaning effect, and cannot damage the particle filter.

Description

Automatic cleaning equipment for particle filter
Technical Field
The invention belongs to the technical field of cleaning of particle filters, and particularly relates to automatic cleaning equipment for a particle filter.
Background
The Diesel vehicle exhaust system comprises an exhaust pipe and a particle Filter (DPF for short) arranged in the exhaust pipe, and when tail gas in the exhaust pipe passes through the DPF, Particulate matters and oil stains in the tail gas are adsorbed and filtered by a Filter element of the DPF. However, as the operation time of the exhaust system of the diesel vehicle increases, particulate matters and oil stains inside the DPF filter element are accumulated, so that the exhaust back pressure of the vehicle increases, the oil consumption of the vehicle increases and the power decreases. In addition, when the DPF filter element is seriously blocked, the exhaust cannot be discharged.
The conventional solution to the above problem is to periodically remove the DPF from the exhaust system of the diesel vehicle and then clean (clean) the DPF to restore the DPF to a normal operating level.
The existing DPF cleaning method mainly adopts heating regeneration cleaning, namely, the cleaning is realized by burning the collected particles and oil stains on the DPF in different heating modes. However, the existing heating regenerations all have more or less drawbacks, such as: the oil injection heating regeneration cleaning method needs additional fuel and has high cost; the common electric heating regeneration cleaning method can generate the problem of uneven heating, thereby causing poor cleaning effect of the DPF and causing the DPF to be locally overheated and damaged; the microwave heating regeneration cleaning method needs to overcome the technical difficulty of how to excite as many modes as possible in the resonant cavity to realize heating; the infrared heating device related to the infrared heating regeneration cleaning method has high manufacturing cost.
In conclusion, the existing heating regeneration cleaning method is easy to damage the DPF, the manufacturing cost of related equipment is high, related technologies are immature, the DPF cannot be efficiently and nondestructively cleaned at low cost, and the cleaning effect is poor.
Disclosure of Invention
In order to solve the problems, the invention provides automatic cleaning equipment for a particle filter, which adopts the following technical scheme:
the invention provides an automatic cleaning device for a particle filter, which is used for heating and cleaning the particle filter and is characterized by comprising the following components: a particulate filter cleaning device for cleaning the particulate filter; and a control device for controlling an operation of the particulate filter cleaning device, wherein the particulate filter cleaning device includes: a cleaning chamber for placing a particulate filter; a heating unit for heating the air flow; an air flow driving unit for providing a driving force for the flow of the air flow; the air inlet unit is used for introducing external air into the cleaning chamber and is provided with an air inlet valve used for controlling the introduction of the external air; and a process temperature sensor for sensing a temperature of the air flow entering the purge chamber as a process temperature, the control device controlling the intake valve, the heating unit, and the air flow driving unit based on the process temperature and a predetermined heat process curve so that the process temperature conforms to the predetermined heat process curve.
The automatic cleaning apparatus for a particulate filter according to the present invention may further have technical features in which the particulate filter cleaning device further includes an air flow input unit for inputting a high-temperature air flow formed after being heated by the heating unit into the cleaning chamber, the process temperature sensor is disposed in an interface area of the air flow input unit and the cleaning chamber, the control device has a timing unit, a current target temperature obtaining unit, a temperature comparing unit, and a control unit, the control unit controls the timing unit to start timing when the particulate filter cleaning device starts cleaning so as to obtain a current process time in real time, the current target temperature obtaining unit obtains a temperature corresponding to the current process time on a predetermined heat process curve according to the current process time as a current target temperature, the control unit obtains the process temperatures from the process temperature sensor in real time as current process temperatures, respectively, and controlling the temperature comparison unit to compare the current processing temperature and the current target temperature to obtain a comparison result, and controlling the working state of at least one of the air inlet valve, the heating unit and the air flow driving unit by the control unit according to the comparison result, so that an actual heating processing curve formed by each current processing temperature conforms to a preset heating processing curve.
The automatic particulate filter cleaning apparatus provided by the present invention may further have a technical feature in which the control unit has an intake valve control portion that controls the intake valve to increase the opening degree when the comparison result is that the current process temperature is higher than the current target temperature, thereby causing the current process temperature to decrease, and controls the intake valve to decrease the opening degree when the comparison result is that the current process temperature is lower than the current target temperature, thereby causing the current process temperature to increase.
The automatic cleaning apparatus for a particulate filter according to the present invention may further include a heating control unit, wherein the control unit includes a heating control unit that controls the heating unit to decrease power so that the current processing temperature decreases when the current processing temperature is higher than the current target temperature as a result of the comparison, and controls the heating unit to increase power so that the current processing temperature increases when the current processing temperature is lower than the current target temperature as a result of the comparison.
The automatic particulate filter cleaning apparatus provided by the present invention may further have a technical feature in that the control unit has a drive control portion that controls the air flow driving unit to increase the driving force so that the current process temperature is decreased when the current process temperature is higher than the current target temperature as a result of the comparison, and controls the air flow driving unit to decrease the driving force so that the current process temperature is increased when the current process temperature is lower than the current target temperature as a result of the comparison.
The automatic cleaning device for the particle filter provided by the invention also has the technical characteristics that the cleaning device for the particle filter further comprises an air flow output unit for outputting high-temperature air flow in the cleaning chamber and an auxiliary temperature sensor arranged in the cleaning chamber or on the air flow output unit, the control device further comprises a temperature difference judging unit, the control unit is provided with a driving control part, the control unit acquires the temperature sensed by the auxiliary temperature sensor in real time as the current auxiliary temperature, controls the temperature difference judging unit to judge whether the difference between the current processing temperature and the current auxiliary temperature is smaller than a preset temperature difference threshold value or not, and controls the air flow driving unit to weaken the driving force when the temperature difference judging unit judges whether the difference is smaller than the preset temperature difference threshold value or not.
The automatic cleaning device for the particle filter provided by the invention can also have the technical characteristics that the cleaning device for the particle filter further comprises an air flow output unit for outputting high-temperature air flow in the cleaning chamber, a first auxiliary temperature sensor arranged in the cleaning chamber, a second auxiliary temperature sensor arranged on the air flow output unit, an auxiliary temperature mean value calculation unit and a temperature difference value judgment unit, wherein the control unit is provided with a driving control part, the control unit acquires the temperature sensed by the first auxiliary temperature sensor as a first current auxiliary temperature in real time, acquires the temperature sensed by the second auxiliary temperature sensor as a second current auxiliary temperature, controls the auxiliary temperature mean value calculation unit to calculate the mean value of the first current auxiliary temperature and the second current auxiliary temperature as an average auxiliary temperature, and controls the temperature difference value judgment unit to judge the difference value between the current processing temperature and the average auxiliary temperature to serve as the average auxiliary temperature And if the temperature difference value is smaller than the preset temperature difference threshold value, the driving control part controls the air flow driving unit to weaken the driving force when the temperature difference value judging unit judges that the temperature difference value is not smaller than the preset temperature difference threshold value.
The automatic particulate filter cleaning apparatus according to the present invention may further include a control device that further includes a high temperature maintaining stage end determination unit and a first temperature lowering stage end determination unit, the control device including an intake valve control unit, an exhaust valve control unit, a reflux valve control unit, a heating control unit, and a drive control unit, the particulate filter cleaning device further including: an exhaust unit for exhausting the high temperature air flow, having an exhaust valve for controlling the exhaust of the high temperature air flow, an air flow reflux unit for refluxing the high temperature air flow from the air flow output unit to make the high temperature air flow circularly flow, having a reflux valve for controlling the reflux of the high temperature air flow, the predetermined heating processing curve at least comprises a high temperature maintaining stage, a first cooling stage and a second cooling stage, the temperature of the high temperature air flow maintained in the high temperature maintaining stage is 550-700 ℃, the duration time of the high temperature maintaining stage is 5-30 min, the high temperature maintaining stage end judging unit judges whether the current processing time reaches the end time of the high temperature maintaining stage, when the high temperature maintaining stage end judging unit judges that the current processing time is yes, the heating control part controls the heating unit to stop processing, and the intake valve control part controls the intake valve to increase the opening degree, and when the judgment of the first cooling stage end judgment unit is yes, the air inlet valve control part controls the air inlet valve to be completely opened, the exhaust valve control part controls the exhaust valve to be opened, and meanwhile, the backflow valve control part controls the backflow valve to be closed.
The automatic cleaning apparatus for a particulate filter according to the present invention may further have a technical feature in that the control device further has a curve storage unit that stores models of different particulate filters and heating processing curves corresponding to the models, a model input unit that allows an operator to input the model of the particulate filter to be cleaned, and a heating curve determination unit that determines a corresponding heating processing curve from the curve storage unit according to the input model as a predetermined heating processing curve.
The automatic cleaning device for the particulate filter provided by the invention can also have the technical characteristics that the control device further comprises a display unit and a picture storage unit, wherein the picture storage unit stores a temperature display picture, and when the heating curve determination unit determines the preset heating treatment curve, the control unit controls the display unit to display the temperature display picture and the preset heating treatment curve and display the current treatment temperature in real time.
The Particulate Filter cleaning system of the present invention can clean a Particulate Filter, such as a Diesel Particulate Filter (DPF) or a Gasoline Particulate Filter (GPF), for example. In addition, the particulate filter cleaning system can also clean other parts in the Exhaust system of the fuel vehicle, which need to clean particulate matters regularly, such as parts related to an Oxidation Catalytic converter (DOC), an Exhaust Gas recirculation system (EGR), a Selective Catalytic Reduction System (SCR), and the like; and the parts to be cleaned are only required to be placed in the cleaning chamber of the equipment, and the high-temperature air flow is ensured to pass through the parts, so that the cleaning can be realized. In order to achieve a more satisfactory cleaning effect when cleaning a component other than the particulate filter, it is also possible to select to replace the support portion of the particulate filter cleaning system suitable for cleaning the particulate filter with a support member adapted to the component.
Action and Effect of the invention
According to the automatic cleaning equipment for the particle filter, the treatment temperature sensor can sense the temperature of the air flow entering the cleaning chamber as the treatment temperature, and the control device controls the air inlet valve, the heating unit and the air flow driving unit based on the treatment temperature and the preset heating treatment curve, so that the treatment temperature is in accordance with the preset heating treatment curve, the treatment temperature can be in accordance with the theoretical heating treatment curve, the particle filter can be accurately heated and cleaned according to the preset heating treatment curve, the cleaning can be rapidly completed, the particle filter is uniformly heated, the particle filter can be cleaned without damage, and a good cleaning effect is achieved.
Drawings
Fig. 1 is a block diagram of an automatic cleaning apparatus for a particulate filter according to a first embodiment of the present invention;
FIG. 2 is a schematic structural view of a particulate filter cleaning apparatus according to a first embodiment of the present invention;
FIG. 3 is a schematic view of a predetermined heat treatment profile according to a first embodiment of the present invention;
FIG. 4 is a graph comparing a predetermined heat treatment profile with an actual heat treatment profile according to a first embodiment of the present invention;
FIG. 5 is a flowchart illustrating the operation of an automatic cleaning apparatus for a particulate filter according to a first embodiment of the present invention;
FIG. 6 is a functional block diagram of an automatic cleaning apparatus and a control apparatus for a particulate filter according to a second embodiment of the present invention;
FIG. 7 is a flow chart of a particulate filter cleaning step in a second embodiment of the present invention;
FIG. 8 is a functional block diagram of an automatic cleaning apparatus and a control apparatus for a particulate filter according to a third embodiment of the present invention;
FIG. 9 is a flow chart of a particulate filter cleaning step in a third embodiment of the present invention;
FIG. 10 is a functional block diagram of an automatic cleaning apparatus and a control apparatus for a particulate filter according to a fourth embodiment of the present invention;
FIG. 11 is a flow chart of a cleaning step of a particulate filter in accordance with a fourth embodiment of the present invention;
FIG. 12 is a functional block diagram of an automatic cleaning apparatus and a control apparatus for a particulate filter according to a fifth embodiment of the present invention;
FIG. 13 is a flow chart of a particulate filter cleaning step in a fifth embodiment of the present invention; and
fig. 14 is a schematic view of a theoretical heat treatment curve in a modification of the present invention.
Detailed Description
In order to make the technical means, the original features, the achieved objects and the effects of the present invention easily understood, an automatic cleaning apparatus for a particulate filter of the present invention will be described in detail with reference to the following embodiments and the accompanying drawings.
< example one >
Fig. 1 is a block diagram of an automatic cleaning apparatus for a particulate filter according to a first embodiment of the present invention.
As shown in fig. 1, the automatic particulate filter cleaning apparatus of the present invention includes a particulate filter cleaning device 3 and a control device 4.
The particulate filter cleaning device 3 is used to clean the particulate filter.
The control device 4 is electrically connected to the particulate filter cleaning device 3, and can control the operation of the particulate filter cleaning device 3.
Fig. 2 is a schematic structural view of a particulate filter cleaning apparatus according to a first embodiment of the present invention.
As shown in fig. 2, the particulate filter cleaning device 3 includes an air flow driving unit 6, an air flow circulating unit 7, a heating unit 8, an air flow input unit 9, a cleaning chamber 10, an air flow output unit 11, an intake unit 32, an exhaust unit 33, a process temperature sensor 40, a first auxiliary temperature sensor 41, and a second auxiliary temperature sensor 42.
The air flow driving unit 6 has a driving motor 12, a blower 13, a driving duct 14, an air inlet 15, and an air outlet 16, and is capable of providing a driving force for the flow of air. Wherein, the driving motor 12 is installed on the top of the cabinet, the blower 13 is connected with the output end of the driving motor 12, the blower 13 can suck air from the air inlet 15 by the driving of the driving motor 12, and exhaust the air from the air outlet 16 after generating air flow.
The air flow returning means 7 is a duct for circulating the high temperature air flow by returning the high temperature air flow from the air flow output means 11, and includes a return valve 37 for controlling the return of the high temperature air flow.
The heating unit 8 is communicated with the air flow refluxing unit 7, and can heat the air flow delivered by the air flow refluxing unit 7 to form a high-temperature air flow.
The air flow input unit 9 is a pipe, is communicated with the heating unit 8, and inputs high-temperature air flow formed after the heating unit 8 heats the air flow into the cleaning chamber 10.
Cleaning chamber 10 is the cuboid case, including the heat preservation cavity and install the heat preservation door on the heat preservation cavity, and heat preservation cavity and heat preservation door all include the metal level and set up the heat preservation in the metal level outside, are provided with a plurality of through holes 31 on the metal level.
The purge chamber 10 is located above the heating unit 8, and communicates with the air flow input unit 9. The particulate filter is placed in the cleaning chamber 10, and the high-temperature air flow generated by the heating unit 8 enters the cleaning chamber 10 through the air flow input unit 9 to clean the particles deposited in the particulate filter.
The air flow output unit 11 is a duct, communicates with the purge chamber 10 and the air flow driving unit 6, and can send the high-temperature air flow in the purge chamber 10 to the air flow driving unit 6.
The air intake unit 32 is a duct capable of introducing outside air into the wash chamber 10, and has an air intake valve 38 for controlling the introduction of the outside air.
The exhaust unit 33 is a duct, communicates with the airflow drive unit 6, can exhaust the high-temperature airflow, and has an exhaust valve 39 for controlling the exhaust of the high-temperature airflow.
In the first embodiment, the intake valve 38, the exhaust valve 39, and the return valve 37 are all electrically controlled valves.
The processing temperature sensor 40 is a temperature sensor, is provided in a boundary area between the air flow input unit 9 and the cleaning chamber 10, and can sense the temperature of the high-temperature air flow entering the cleaning chamber 10 as a processing temperature.
The first auxiliary temperature sensor 41 is a temperature sensor, is disposed in the cleaning chamber 10 and near the airflow output unit 11, and is capable of sensing the temperature of the airflow passing through the particulate filter as a first auxiliary temperature.
The second auxiliary temperature sensor 42 is a temperature sensor provided in the airflow output unit 11 and is capable of sensing the temperature of the airflow passing through the particulate filter as a second auxiliary temperature.
The control device 4 has a control unit 74, a screen storage unit 60, a curve storage unit 61, a model input unit 62, a heating curve determination unit 63, a timing unit 64, a current target temperature acquisition unit 65, a display unit 66, a warming-up stage end determination unit 67, a high temperature maintenance stage end determination unit 68, a temperature comparison unit 69, a first warming-up stage end determination unit 70, a second warming-up stage end determination unit 72, an auxiliary temperature mean value calculation unit 73, and a temperature difference value determination unit 74.
The control unit 74 includes an intake valve control section 743, a return valve control section 741, an exhaust valve control section 744, a heating control section, and a drive control section.
The screen storage unit 60 stores a temperature display screen.
The curve storage unit 61 stores models of different particulate filters and heat treatment curves corresponding to the models.
Next, the functions of the above-described units and sections will be specifically described by taking the automatic cleaning process of the automatic particulate filter cleaning device as an example.
Before the automatic cleaning apparatus for the particulate filter automatically cleans, the operator places the particulate filter to be cleaned in the cleaning chamber 10 and inputs the type of the particulate filter to be cleaned through the type input unit 62.
In the first embodiment, the model input unit 62 is a liquid crystal display provided on the particulate filter cleaning apparatus 3, and the operator selects the model of the particulate filter to be cleaned on the liquid crystal display.
The heating profile determining unit 63 determines a corresponding heating processing profile from the profile storage unit 61 as a predetermined heating processing profile according to the model input by the operator.
When the heating-process curve determining unit 63 determines the predetermined heating-process curve, the control unit 74 controls the display unit 66 to display the temperature display screen together with the predetermined heating-process curve.
FIG. 3 is a schematic view of a predetermined heat treatment profile according to a first embodiment of the present invention.
As shown in fig. 3, the predetermined heating process curve includes a temperature-up phase, a high-temperature maintaining phase, a first temperature-down phase, and a second temperature-down phase.
The temperature-raising stage comprises a first temperature-raising sub-stage, a stabilizing sub-stage and a second temperature-raising sub-stage.
The initial temperature in the first temperature-raising sub-stage is T0After a preheating time t1After heating, the temperature is raised to the preheating temperature T1Entering a stationary sub-phase; during the plateau sub-phase, the temperature is always kept at the preheating temperature T1Until a stationary time t elapses2Then, entering a second temperature rise sub-stage; in the second temperature raising sub-stage, the temperature raising time t passes3Temperature from preheating temperature T1Is raised to the cleaning temperature T2And then enter the high temperature maintaining stage.
Wherein the preheating time t1Stationary time t2And a temperature rise time t3The sum of the first preset time and the preheating time t is 10min-20min11min-5min, stationary time t2Is 3min-8min, and has an initial temperature T0At a temperature of 25-100 ℃ and a preheating temperature T1At 250-350 deg.C and cleaning temp. T2Is 550-700 ℃.
In the first embodiment, the preheating time t1Is 3min, stationary time t2Is 5min, the temperature rise time t3At an initial temperature T of 7min0At room temperature, preheating temperature T1At 300 ℃ and a washing temperature T2The temperature was 600 ℃.
During the high temperature maintaining period, the temperature is always kept at the cleaning temperature T2(i.e., the temperature at which the high-temperature air flow is maintained in the high-temperature maintenance phase), the cleaning time t is elapsed4(i.e., the duration of the high temperature maintenance phase) and then enters a first cool down phase.
Wherein the cleaning time t4Is 10min-20 min.
In the first embodiment, the cleaning time t4It is 15 min.
In the first cooling stage, the precooling time t is passed5Temperature from cleaning temperature T2Cooling to precooling temperature T3And then entering a second cooling stage.
Wherein the pre-cooling time t5Is 3min-7min, precooling temperature T3Is 450-500 ℃.
In the first embodiment, the pre-cooling time t5At a precooling temperature T of 5min3The temperature was 480 ℃.
In the second temperature reduction stage, the cooling time t passes6Temperature from pre-cooling temperature T3Cooling to the take-out temperature T4So that the particulate filter can be taken out.
Wherein the cooling time t6Is 8min-15min, and the taking-out temperature T4Is 25 to 100 ℃.
In the first embodiment, the cooling time t6For 10min, take out temperature T4At room temperature.
In addition, theWhen the automatic cleaning equipment for the particle filter cleans the first particle filter, the initial temperature T0Is at room temperature; when the automatic cleaning equipment for the particle filter is continuously operated to clean the second particle filter, the initial temperature T'0Is higher than room temperature and lower than precooling temperature.
When the particulate filter cleaning device 3 starts cleaning, the control unit 74 controls the timing unit 64 to start timing so as to obtain the current processing time in real time.
The current target temperature acquisition unit 65 acquires a temperature corresponding to the current processing time on a predetermined heat processing curve according to the current processing time as a current target temperature.
FIG. 4 is a graph comparing a predetermined heat treatment profile with an actual heat treatment profile according to the first embodiment of the present invention.
As shown in fig. 4, the control unit 74 obtains the processing temperatures from the processing temperature sensors 40 in real time as the current processing temperatures, and the display unit 66 displays the current processing temperatures in real time, so that the operator can observe the difference between the current processing temperatures and the current target temperatures at any time.
The control unit 74 controls the temperature comparison unit 69 to compare the current processing temperature and the current target temperature to obtain a comparison result.
The control unit 74 controls the open/close state of the intake valves 38 in real time based on the difference between the current process temperature and the current target temperature so that the actual heat treatment curve formed by each current process temperature conforms to the predetermined heat treatment curve. Specifically, the method comprises the following steps:
before the first temperature-raising sub-stage (i.e. before the timing unit 64 starts timing), the reflux valve control part 741 controls the reflux valve 37 to open, the exhaust valve control part 744 controls the exhaust valve 39 to close, and the drive control part controls the blower 13 in the air flow driving unit 6 to start operating and maintain a certain power, so that the air flow can flow from the driving duct 14 to the air flow reflux unit 7, and then sequentially flows through the heating unit 8, the air flow input unit 9, the cleaning chamber 10, the air flow output unit 11 and the air flow driving unit 6 to form a circulating flow.
Meanwhile, the heating control part controls the heating unit 8 to start working, a certain power is kept, the air flow passing through the heating unit 8 is heated, the air inlet valve control part 743 controls the air inlet valve 38 to be closed, the introduction of external air is stopped, and further the high-temperature air flow is continuously heated by the heating unit 8 in a circulating flow to form high-temperature air flow.
Next, the control unit 74 controls the temperature raising stage end judgment unit 67 to sequentially judge whether the current processing time reaches the end time of the first temperature raising sub-stage, whether the end time of the plateau sub-stage, and whether the end time of the second temperature raising sub-stage.
When the temperature-raising-stage end judgment unit 67 judges that the current processing time reaches the end time of the first temperature-raising sub-stage, the particulate filter cleaning process enters the smoothing sub-stage from the first temperature-raising sub-stage, and the intake valve control portion 743 controls the intake valve 38 to increase the opening degree so that the current processing temperature is maintained at the preheating temperature T1。
When the temperature-raising-stage end judgment unit 67 judges that the current processing time reaches the end time of the smoothing sub-stage, the particulate filter cleaning process enters the second temperature-raising sub-stage from the smoothing sub-stage, and the intake valve control portion 743 controls the intake valve 38 to decrease the opening degree, so that the cool air entering the cleaning chamber 10 becomes less and the current processing temperature can be raised continuously.
When the temperature-raising stage end judgment unit 67 judges that the current process time reaches the end time of the second temperature-raising sub-stage, the particulate filter cleaning process enters the high temperature maintenance stage from the temperature-raising stage, and the intake valve control portion 743 controls the intake valve 38 to increase the opening degree so that the current process temperature is maintained at the cleaning temperature T2。
After entering the high temperature maintaining phase, the control unit 74 controls the high temperature maintaining phase ending judging unit 68 to judge whether the current processing time reaches the ending time of the high temperature maintaining phase.
When the high temperature maintenance phase end judgment unit 68 judges yes, the particulate filter cleaning process proceeds from the high temperature maintenance phase to the first temperature reduction phase, the heating control section controls the heating unit 8 to stop the process, and the intake valve control section 743 controls the intake valve 38 to increase the opening degree.
In addition, in the high temperature maintaining stage, the control unit 74 obtains the temperature sensed by the first auxiliary temperature sensor 41 as a first current auxiliary temperature and obtains the temperature sensed by the second auxiliary temperature sensor 42 as a second current auxiliary temperature in real time.
Further, the control unit 74 controls the auxiliary temperature mean value calculation unit 73 to calculate a mean value of the first current auxiliary temperature and the second current auxiliary temperature as the average auxiliary temperature.
Then, the control unit 74 controls the temperature difference value judging unit 74 to judge whether the difference value between the current process temperature and the average assist temperature is less than a predetermined temperature difference threshold value.
When the temperature difference determining unit 74 determines that the temperature difference is equal to the first current auxiliary temperature, the control unit 74 obtains the next first current auxiliary temperature and the next second current auxiliary temperature, further controls the auxiliary temperature mean value calculating unit 73 to calculate, and then controls the temperature difference determining unit 74 to further determine and continuously circulate until the high temperature maintaining stage ending determining unit 68 determines that the ending time of the high temperature maintaining stage is reached.
When the temperature difference value determining unit 74 determines that the temperature difference value is not greater than the predetermined temperature, the drive control unit controls the airflow driving unit 6 to reduce the driving force, so that the high-temperature airflow rate is reduced, and at this time, the particulate filter can be sufficiently contacted with the high-temperature airflow, so that the oil stains on the particulate filter and the combustion of the particulate matters are more sufficient, and the cleaning efficiency is improved.
The first temperature-decreasing stage end judgment unit 70 judges whether the current processing time reaches the end time of the first temperature-decreasing stage.
After entering the first temperature-reducing stage, the control unit 74 controls the first temperature-reducing stage end judgment unit 70 to judge whether the current processing time reaches the end time of the first temperature-reducing stage.
When the first cool-down period end determination unit 70 determines that the end time of the first cool-down period is reached, the particulate filter cleaning process enters the second cool-down period from the first cool-down period, the intake valve control portion 743 controls the intake valve 38 to be fully opened, and the exhaust valve control portion 744 controls the exhaust valve 39 to be opened, so that the high-temperature air flow in the cleaning chamber 10 flows from the air flow driving unit 6 to the exhaust unit 33, and is discharged from the particulate filter cleaning apparatus 3.
Meanwhile, the return valve control part 741 controls the return valve 37 to close, so that the high-temperature air in the air flow return unit 7 and the heating unit 8 stays in the two units and keeps a certain residual temperature, and the heating unit 8 can heat the air on the basis of the residual temperature in the next cleaning process.
When the temperature rise phase, the high temperature maintenance phase, and the first temperature decrease phase are determined as being negative by the temperature rise phase end determination means 67, the high temperature maintenance phase end determination means 68, and the first temperature decrease phase end determination means 70, the intake valve control section 743 feedback-controls the intake valve 38 based on the comparison result. Namely:
if the comparison result shows that the current process temperature is higher than the current target temperature, intake valve control portion 743 controls intake valve 38 to increase the opening degree so that the cool air introduced into purge chamber 10 is increased and the current process temperature is decreased.
If the comparison result shows that the current process temperature is lower than the current target temperature, intake valve control portion 743 controls intake valve 38 to decrease the opening degree so that the cool air entering into purge chamber 10 is decreased and the current process temperature is increased.
By the above real-time feedback control, the actual heat treatment curve formed by the current treatment temperature at each time can be made to conform to the theoretical heat treatment curve.
Then, the control unit 74 controls the second temperature decreasing stage end judging unit 72 to judge whether the current processing time reaches the end time of the second temperature decreasing stage.
When the second cool-down phase end determination means 72 determines that the end time of the second cool-down phase has not been reached, the intake valve control portion 743 controls the intake valve 38 to be kept in the fully open state, and the exhaust valve control portion 744 controls the exhaust valve 39 to be kept in the fully open state.
When the second temperature decrease stage end determination unit 72 determines that the end time of the second temperature decrease stage is reached, the particulate filter cleaning is ended, and the operation manager can take out the particulate filter that has been cleaned from the particulate filter cleaning device 3.
Fig. 5 is a flowchart of an operation process of the automatic cleaning apparatus for a particulate filter according to the first embodiment of the present invention.
As shown in fig. 5, the operation of the automatic cleaning apparatus for a particulate filter includes the following steps:
step S1, the model input unit 62 lets the operator input the model of the particulate filter to be cleaned, and then proceeds to step S2;
step S2, the heating-process-curve determining unit 63 determines the corresponding heating process curve from the curve storage unit 61 as a predetermined heating process curve according to the model input by the operator, and then proceeds to step S3;
in step S3, the control unit 74 controls the corresponding units to be set to the initial state, that is, the reflux valve control unit 741 controls the reflux valve 37 to open, the exhaust valve control unit 744 controls the exhaust valve 39 to close, the drive control unit controls the blower 13 in the air flow driving unit 6 to start operating and maintain a constant power, the heating control unit controls the heating unit 8 to start operating, the intake valve control unit 743 controls the intake valve 38 to close, and the process then proceeds to step S4;
in step S4, the timer unit 64 starts timing, and then proceeds to step S5;
step S5, the control unit 74 obtains the current processing time from the timing unit 64, the current target temperature obtaining unit 65 obtains the temperature corresponding to the current processing time on the predetermined heat processing curve according to the current processing time as the current target temperature, and at the same time, the control unit 74 obtains the processing temperatures from the processing temperature sensor 40 in real time as the current processing temperatures, respectively, and then the process goes to step S6;
in step S6, the control unit 74 controls the temperature comparison unit 69 to compare the current processing temperature and the current target temperature to obtain a comparison result, and then the process goes to step S7;
in step S7, the control unit 74 controls the first cooling stage end determination unit 70 to determine whether the current processing time reaches the end time of the first cooling stage, and if not, the process proceeds to step S8, and if yes, the process proceeds to step S9;
in step S8-1, the intake valve control section 743 controls the increasing or decreasing opening degree of the intake valve 38 in accordance with the comparison result so that the curve formed by each of the current process temperatures conforms to the predetermined heat-treatment curve, and then proceeds to step S5;
in step S9, intake valve control portion 743 controls intake valve 38 to be fully opened, exhaust valve control portion 744 controls exhaust valve 39 to be opened, so that the high temperature air flow in cleaning chamber 10 flows from air flow driving unit 6 to exhaust unit 33, and then is exhausted from particulate filter cleaning device 3, and at the same time, return valve control portion 741 controls return valve 37 to be closed, so that the high temperature air in air flow return unit 7 and heating unit 8 stays in the two units and keeps a certain residual temperature, and then, the process proceeds to step S10;
in step S10, the control unit 74 controls the second cooling stage end determination unit 72 to determine whether the current processing time reaches the end time of the second cooling stage, and proceeds to step S11 until yes;
at step S11, the cleaning of the particulate filter is completed, and the operation manager can take out the cleaned particulate filter from the particulate filter cleaning apparatus 3 and enter the end state.
Example one action and Effect
According to the particle filter self-cleaning equipment that this embodiment one provided, because the temperature that gets into the air current of washing chamber can be sensed to the processing temperature inductor as processing temperature, and then controlling means is based on processing temperature and predetermined heat treatment curve to the admission valve, heating unit and air current drive unit control, thereby make processing temperature accord with predetermined heat treatment curve, consequently, can make processing temperature accord with theoretical heat treatment curve, guarantee that particle filter can accurately heat according to predetermined heat treatment curve and wash, thereby can accomplish the washing fast, and be heated evenly, can wash particle filter harmlessly, better cleaning performance has.
In the first embodiment, the first auxiliary temperature sensor 41 and the second auxiliary temperature sensor 42 can sense the temperature of the air flow passing through the particulate filter, and then determine whether to control the blower 13 in the air flow driving unit 6 to reduce the driving force according to the difference between the average value of the two air flow temperatures and the current processing temperature, so as to avoid the problem that the particulate filter cannot completely absorb the heat energy in the temperature-sensitive air flow due to too fast air flow velocity, and to make the cleaning process of the particulate filter have higher efficiency.
In the first embodiment, since the model input unit 62 and the heating curve determination unit 63 can determine the corresponding predetermined heating process curve according to the model of the particulate filter to be cleaned, they can be applied to different models of particulate filters.
In the first embodiment, since the display unit displays the current treatment temperature and the predetermined heat treatment curve in real time, the operator can observe the cleaning stage of the cleaning filter and the treatment temperature in real time, and can take emergency measures if an abnormal situation is found.
< example two >
For convenience of expression, in the second embodiment, the same reference numerals are given to the same structures as those in the first embodiment, and the same descriptions are omitted.
In the first embodiment, intake valve control unit 743 feedback-controls intake valve 38 in the temperature raising stage, the high temperature maintaining stage, and the first temperature lowering stage so that the current process temperature matches the current target temperature, based on the comparison result. In contrast, in the second embodiment, the heating control unit performs feedback control on the heating unit 8 according to the comparison result, so that the current processing temperature matches the current target temperature.
Fig. 6 is a functional block diagram of an automatic cleaning device and a control device for a particulate filter according to a second embodiment of the present invention.
As shown in fig. 6, the control unit 74 'of the control device 4' has an intake valve control section 742 'and a heating control section 744' having different control functions from those of the first embodiment. Specifically, the method comprises the following steps:
in the temperature rise stage and the high temperature maintenance stage in which the current processing time is in the theoretical heating processing curve, when the temperature rise stage end determination unit 67 and the high temperature maintenance stage end determination unit 68 determine that the current processing time is not in the theoretical heating processing curve, the heating control section 744' performs feedback control on the heating unit 8 according to the comparison result, and performs compensation control on the heating unit 8 according to the actual temperature change rate. Namely:
when the comparison result shows that the current processing temperature is higher than the current target temperature, the heating control portion controls the heating unit 8 to reduce the power, so that the temperature of the high-temperature air flow heated by the heating unit 8 is reduced, and the current processing temperature is reduced.
When the comparison result shows that the current processing temperature is lower than the current target temperature, the heating control portion controls the heating unit 8 to increase the power, so that the temperature of the high-temperature air flow heated by the heating unit 8 is increased, and the current processing temperature is increased.
By the above-described feedback control and compensation control, the actual heat treatment curve formed by the current treatment temperature at each time can be made to strictly conform to the theoretical heat treatment curve only by the control of the heating unit 8.
In the above-described warm-up phase and high-temperature maintenance phase, the intake valve controller 742' always controls the intake valve 38 to be closed. In the second embodiment, when the current processing time is in the first temperature-reducing stage, the heating control portion 744 'controls the heating unit 8 to be turned off, and the intake valve control portion 742' performs feedback control on the intake valve.
FIG. 7 is a flow chart of the step of cleaning the particulate filter according to the second embodiment of the present invention.
As shown in fig. 7, the difference between the cleaning step of the second embodiment and the first embodiment is that there is an additional temperature control step between step S6 and step S7, namely:
after the step S6 is executed, the process proceeds to a step S12-2;
step S12-2, the high temperature maintaining stage ending judging unit judges whether the current processing time reaches the ending time of the high temperature maintaining stage, if not, the step S13-2 is entered, and if so, the step S7 is entered;
in step S13-2, the heating control part 744' controls the heating unit 8 to increase or decrease the power by a predetermined variation value according to the comparison result, and then proceeds to step S5.
In the above process, before the current processing time reaches the end time of the high temperature maintaining stage (i.e. the current processing time is in the temperature increasing stage and the high temperature maintaining stage of the theoretical heating processing curve), the heating control portion 744' performs feedback control on the heating unit 8 to make the current processing temperature conform to the theoretical heating processing curve. After entering the first temperature-lowering stage, the heating control portion 744 'controls the heating unit 8 to be turned off, and the intake valve control portion 742' performs feedback control on the intake valve 38 to make the current processing temperature conform to the theoretical heating processing curve.
Example two actions and effects
On the basis of the same actions and effects as those of the first embodiment, in the second embodiment, since the power of the heating unit is controlled by the heating control unit according to the comparison result and the actual temperature change rate, only the heating unit is controlled to make the current processing temperature conform to the theoretical heating processing curve.
< example three >
For convenience of expression, in the third embodiment, the same reference numerals are given to the same structures as those in the first embodiment, and the same descriptions are omitted.
In the first embodiment, in the temperature raising stage, the high temperature maintaining stage, and the first temperature lowering stage, the intake valve control section 743 feedback-controls the intake valve 38 according to the comparison result, so that the current processing section feedback-controls the intake valve 38 according to the comparison result, and the drive control section feedback-controls the blower 13 according to the comparison result, so that the current processing temperature can more quickly meet the current target temperature.
Fig. 8 is a functional block diagram of an automatic cleaning device and a control device for a particulate filter according to a third embodiment of the present invention.
As shown in fig. 8, the control unit 74 "of the control device 4" includes an intake valve control unit 742 "and a drive control unit 745" having different control functions from those of the first embodiment. Specifically, the method comprises the following steps:
in the temperature rise stage, the high temperature maintenance stage, and the first temperature decrease stage in which the current processing time is in the theoretical heating processing curve, when the temperature rise stage end determination means, the high temperature maintenance stage end determination means, and the first temperature decrease stage end determination means determine that the processing time is not in the theoretical heating processing curve, the intake valve control section 742 ″ and the drive control section 745 ″ respectively perform feedback control on the intake valve 38 and the blower 13 according to the comparison result. Namely:
when the comparison result is that the current process temperature is higher than the current target temperature, the drive control portion controls the blower 13 in the air flow drive unit 6 to increase the driving force, and at the same time, the intake valve control portion 743 controls the intake valve 38 to increase the opening degree, so that the current process temperature is decreased more quickly.
When the comparison result is that the current process temperature is lower than the current target temperature, the drive control portion controls the blower 13 in the air flow drive unit 6 to reduce the driving force, and at the same time, the intake valve control portion 743 controls the intake valve 38 to reduce the opening degree, so that the current process temperature rises faster.
By the above-described feedback control, the actual heat treatment curve formed by the current treatment temperature at each timing can be made to strictly conform to the theoretical heat treatment curve by the combined control of the intake valve 38 and the blower 13.
FIG. 9 is a flow chart of the cleaning step of the particulate filter according to the third embodiment of the present invention.
As shown in fig. 9, the difference between the cleaning step of the particulate filter in the third embodiment and the cleaning step of the particulate filter in the first embodiment is that the step S8 is different, and the step S8-3 in the third embodiment is as follows:
after the step S7 is executed, the flow proceeds to a step S8-3;
in step S8-3, the intake valve control part controls the intake valve to increase or decrease the opening degree according to the comparison result, and at the same time, the driving control part controls the blower to raise or lower the driving force according to the comparison result, and then the process proceeds to step S5.
Example three actions and effects
In the third embodiment, the opening degree of the intake valve and the power of the blower are controlled by the intake valve control unit and the drive control unit according to the comparison result, so that the current processing temperature conforms to the theoretical heat processing curve.
< example four >
For convenience of expression, in the fourth embodiment, the same components as those in the first embodiment are given the same reference numerals, and the same description is omitted.
In the first embodiment, intake valve control unit 743 feedback-controls intake valve 38 in the temperature raising stage, the high temperature maintaining stage, and the first temperature lowering stage so that the current process temperature matches the current target temperature, based on the comparison result. In contrast, in the fourth embodiment, not only the heating control section performs feedback control on the heating unit 8 according to the comparison result, but also the drive control section performs feedback control on the blower 13 in the air flow driving unit 6 according to the comparison result, so that the current processing temperature more quickly conforms to the current target temperature.
Fig. 13 is a functional block diagram of an automatic cleaning device and a control device for a particulate filter according to a fourth embodiment of the present invention.
As shown in fig. 10, the control unit 74 "'of the control device 4"' has a heating control section 742 "'and a driving control section 745"' having different control functions from those of the first embodiment. Specifically, the method comprises the following steps:
in the temperature rise stage, the high temperature maintenance stage, and the first temperature decrease stage in which the current processing time is in the theoretical heating processing curve, when the temperature rise stage end determination unit, the high temperature maintenance stage end determination unit, and the first temperature decrease stage end determination unit determine that the current processing time is not in the theoretical heating processing curve, the heating control section 742 "'and the drive control section 745"' respectively perform feedback control on the heating unit 8 and the blower 13 according to the comparison result. Namely:
when the comparison result is that the current process temperature is higher than the current target temperature, the drive control section 745 '"controls the blower 13 in the air flow drive unit 6 to increase the driving force, and at the same time, the heating control section 742'" controls the heating unit to decrease the power, so that the current process temperature decreases faster.
When the comparison result is that the current process temperature is lower than the current target temperature, the drive control section 745 '"controls the blower 13 in the air flow drive unit 6 to reduce the driving force, and at the same time, the heating control section 742'" controls the heating unit to increase the power, so that the current process temperature is increased more quickly.
By the above feedback control, the actual heat treatment curve formed by the current treatment temperature at each time can be made to strictly conform to the theoretical heat treatment curve by the combined control of the heating unit and the blower.
In the above-described warming-up stage and high-temperature maintaining stage, the intake valve control portion 742' ″ always controls the intake valve 38 to be kept closed. In the fourth embodiment, when the current processing time is in the first temperature-reducing stage, the heating control portion 744 "'controls the heating unit 8 to close, and the intake valve control portion 742"' performs feedback control on the intake valve, where the feedback control process of the first temperature-reducing stage in the first temperature-reducing stage is the same as that in the first embodiment, and is not described herein again.
FIG. 11 is a flow chart of a cleaning step of a particulate filter according to a fourth embodiment of the present invention.
As shown in fig. 11, the difference between the cleaning step of the particulate filter in the fourth embodiment and the cleaning step of the particulate filter in the first embodiment is that the step S8 is different, and the step S8-4 in the third embodiment is as follows:
after the step S7 is executed, the flow goes to a step S8-4;
in step S8-4, the heating control part controls the heating unit to increase or decrease the power according to the comparison result, and at the same time, the driving control part controls the blower to increase or decrease the driving force according to the comparison result, and then the process proceeds to step S5.
Example four actions and effects
On the basis of the same actions and effects as those of the first embodiment, in the fourth embodiment, since the power of the heating unit and the driving force of the blower are respectively controlled by the heating control portion and the driving control portion according to the comparison result, the current processing temperature is made to conform to the theoretical heating processing curve more quickly.
< example five >
For convenience of expression, in the fifth embodiment, the same structures as those in the first embodiment are given the same reference numerals, and the same descriptions are omitted.
In the first embodiment, intake valve control unit 743 feedback-controls intake valve 38 in the temperature raising stage, the high temperature maintaining stage, and the first temperature lowering stage so that the current process temperature matches the current target temperature, based on the comparison result. In contrast, in the fifth embodiment, the intake valve control portion 743, the drive control portion, and the heating control portion simultaneously perform feedback control on the corresponding intake valve 38, the blower 13 in the air flow driving unit 6, and the heating unit 8 according to the comparison result, so that the current process temperature coincides with the current target temperature.
FIG. 12 is a functional block diagram of an apparatus for automatically cleaning a particle free filter and a control apparatus according to an embodiment of the present invention.
As shown in fig. 12, the control unit 74 "" of the control device 4 "" has an intake valve control section 743 "", a heating control section 742 "" and a drive control section 745 "" having different control functions from those of the first embodiment. Specifically, the method comprises the following steps:
in the temperature rise stage, the high temperature maintenance stage, and the first temperature reduction stage in which the current processing time is in the theoretical heating processing curve, when the temperature rise stage end determination means, the high temperature maintenance stage end determination means, and the first temperature reduction stage end determination means determine that they are not, intake valve control section 743 "", heating control section 742 "", and drive control section 745 "", respectively, perform feedback control on the intake valve, heating unit 8, and blower 13, based on the comparison results. Namely:
when the comparison result shows that the current processing temperature is higher than the current target temperature, intake valve control section 743 "" controls the intake valve to increase the degree of opening, drive control section 745 "" controls blower 13 in air flow driving unit 6 to increase the driving force, and heating control section 742 "" controls the heating unit to decrease the power, so that the current processing temperature decreases faster.
When the comparison result shows that the current process temperature is lower than the current target temperature, intake valve control section 743 "" controls the intake valve to decrease the opening degree, drive control section 745 "" controls blower 13 in air flow driving unit 6 to decrease the driving force, and heating control section 742 "" controls the heating unit to increase the power, so that the current process temperature increases more quickly.
By the above feedback control, the actual heat treatment curve formed by the current treatment temperature at each time can be made to strictly conform to the theoretical heat treatment curve by the combined control of the heating unit and the blower.
FIG. 13 is a flow chart of a fifth embodiment of the invention in which a particulate filter is cleaned.
As shown in fig. 13, the difference between the cleaning step of the particulate filter in the fifth embodiment and the cleaning step of the particulate filter in the first embodiment is that the step S8 is different, and the step S8-5 in the fifth embodiment is as follows:
after the step S7 is executed, the flow proceeds to the step S8-5;
in step S8-5, intake valve control section 743 "" controls the intake valve to increase or decrease the opening degree, heating control section controls the heating unit to increase or decrease the power according to the comparison result, and drive control section controls the blower to increase or decrease the driving force according to the comparison result, and then the process proceeds to step S5.
Example five actions and effects
On the basis of the same actions and effects as those of the first embodiment, in the fifth embodiment, the current processing temperature is made to more quickly conform to the theoretical heat processing curve because the opening degree of the intake valve, the power of the heating unit, and the driving force of the blower are respectively controlled by the intake valve control portion, the heating control portion, and the driving control portion according to the comparison result.
< modification example >
For convenience of description, the same reference numerals are given to the same components as those in the first embodiment, and the same descriptions are omitted.
In the first embodiment, the temperature-raising stage includes a first temperature-raising sub-stage, a smoothing sub-stage and a second temperature-raising sub-stage. In contrast, in the present modification, the temperature raising stage does not include the sub-stage, and is a one-step curve (as shown in fig. 14).
In fig. 14, in the temperature rising stage of the predetermined heat treatment curve, the air flow is continuously raised from the initial temperature T0(T0 is room temperature) to the cleaning temperature T2(T2 is 600 ℃) in accordance with the predetermined temperature rising curve for the first predetermined time T1(T1 is 15min), and the temperature rising rate of the temperature rising curve is gradually decreased.
The high temperature maintaining stage, the first temperature decreasing stage and the second temperature decreasing stage of the predetermined heating processing curve are the same as those of the first embodiment, and are not described herein again.
Effects and effects of the modified examples
In addition to the same actions and effects as those of the first, second, third, fourth and fifth embodiments, in the first modification, the air flow is continuously raised from the initial temperature room temperature to the washing temperature of 600 ℃ within the first predetermined time of 15min according to the predetermined temperature raising curve in the temperature raising stage, and the temperature raising rate of the temperature raising curve is gradually reduced. Thus, the temperature of the air stream can be brought to the cleaning temperature more quickly than in the first embodiment, further reducing the time taken for the cleaning process.
The first embodiment, the second embodiment, the third embodiment, the fourth embodiment, the fifth embodiment and the modified examples are only used for illustrating the specific implementation manner of the present invention, and the present invention is not limited to the description scope of the first embodiment.
In the first, second, third, fourth, fifth and modified examples, the first and second auxiliary temperature sensors 41 and 42 are temperature sensors capable of sensing the temperature of the air flow passing through the particulate filter. In another aspect of the present invention, the temperature of the air flow passing through the particulate filter may be sensed by an auxiliary temperature sensor disposed in the cleaning chamber 10 or on the air flow output unit 11, and the temperature difference determination unit 74 may directly determine whether the difference between the current processing temperature and the temperature of the air flow sensed by the auxiliary temperature sensor is smaller than a predetermined temperature threshold.
In the first, second, third, fourth, fifth and modified embodiments, the model input unit 62 is a liquid crystal display provided on the particulate filter cleaning apparatus 3. In another aspect of the present invention, the model input unit 62 may be a mobile terminal, and the control device 4 further includes a communication unit, after the operator inputs the model of the particulate filter to be cleaned on the mobile terminal, the mobile terminal sends the input model to the control device 4, and the communication unit receives the input model, and the heating curve determining unit 63 determines the predetermined heating processing curve.

Claims (10)

1. An automatic cleaning apparatus for a particulate filter, which is used for heating and cleaning the particulate filter, comprising:
a particulate filter cleaning device for cleaning the particulate filter; and
a control device for controlling the operation of the particulate filter cleaning device,
wherein the particulate filter cleaning apparatus comprises:
a wash chamber for housing the particulate filter;
a heating unit for heating the air flow;
an air flow driving unit for providing a driving force for the flow of the air;
the air inlet unit is used for introducing external air into the cleaning chamber and is provided with an air inlet valve used for controlling the introduction of the external air; and
a process temperature sensor for sensing a temperature of the air flow entering the purge chamber as a process temperature,
the control device controls the intake valve, the heating unit, and the air flow driving unit based on the process temperature and a predetermined heat treatment curve so that the process temperature conforms to the predetermined heat treatment curve.
2. The automatic particulate filter cleaning apparatus according to claim 1, wherein:
wherein the particulate filter cleaning apparatus further comprises an air flow input unit for inputting a high temperature air flow heated by the heating unit into the cleaning chamber,
the process temperature sensor is disposed in an interface area of the air flow input unit and the purge chamber,
the control device is provided with a timing unit, a current target temperature acquisition unit, a temperature comparison unit and a control unit,
the control unit controls the timing unit to start timing when the particulate filter cleaning device starts cleaning so as to obtain the current processing time in real time,
the current target temperature acquisition unit acquires a temperature corresponding to the current processing time on the predetermined heat processing curve according to the current processing time as a current target temperature,
the control unit acquires the processing temperatures from the processing temperature sensor in real time to be used as current processing temperatures respectively, controls the temperature comparison unit to compare the current processing temperatures with the current target temperature to obtain comparison results,
the control unit controls the working state of at least one of the air inlet valve, the heating unit and the air flow driving unit according to the comparison result, so that the actual heat treatment curve formed by each current treatment temperature conforms to the preset heat treatment curve.
3. The automatic particulate filter cleaning apparatus according to claim 2, wherein:
wherein the control unit has an intake valve control portion,
when the comparison result is that the current process temperature is higher than the current target temperature, the intake valve control portion controls the intake valve to increase the opening degree so that the current process temperature decreases,
when the comparison result is that the current process temperature is lower than the current target temperature, the intake valve control portion controls the intake valve to decrease the opening degree, so that the current process temperature is increased.
4. The automatic particulate filter cleaning apparatus according to claim 2, wherein:
wherein the control unit has a heating control part,
when the comparison result is that the current processing temperature is higher than the current target temperature, the heating control part controls the heating unit to reduce power so that the current processing temperature is reduced,
when the comparison result is that the current processing temperature is lower than the current target temperature, the heating control part controls the heating unit to increase power, so that the current processing temperature is increased.
5. The automatic particulate filter cleaning apparatus according to claim 2, wherein:
wherein the control unit has a drive control section,
the drive control portion controls the air flow driving unit to increase the driving force so that the current process temperature is decreased when the comparison result is that the current process temperature is higher than the current target temperature,
when the comparison result is that the current process temperature is lower than the current target temperature, the drive control portion controls the airflow drive unit to weaken the driving force so that the current process temperature is increased.
6. The automatic particulate filter cleaning apparatus according to claim 2, wherein:
wherein the particulate filter cleaning apparatus further comprises an air flow output unit for outputting the high temperature air flow in the cleaning chamber and an auxiliary temperature sensor provided in the cleaning chamber or on the air flow output unit,
the control device is also provided with a temperature difference value judging unit,
the control unit is provided with a drive control part,
the control unit acquires the temperature sensed by the auxiliary temperature sensor in real time as the current auxiliary temperature, controls the temperature difference value judging unit to judge whether the difference value between the current processing temperature and the current auxiliary temperature is less than a preset temperature difference threshold value or not,
the drive control unit controls the airflow drive unit to reduce the drive force when the temperature difference determination unit determines that the temperature difference is negative.
7. The automatic particulate filter cleaning apparatus according to claim 2, wherein:
wherein the particulate filter cleaning apparatus further comprises an air flow output unit for outputting the high temperature air flow in the cleaning chamber, a first auxiliary temperature sensor provided in the cleaning chamber, and a second auxiliary temperature sensor provided on the air flow output unit,
the control device is also provided with an auxiliary temperature mean value calculation unit and a temperature difference value judgment unit,
the control unit is provided with a drive control part,
the control unit acquires the temperature sensed by the first auxiliary temperature sensor as a first current auxiliary temperature in real time, acquires the temperature sensed by the second auxiliary temperature sensor as a second current auxiliary temperature, controls the auxiliary temperature mean value calculation unit to calculate the mean value of the first current auxiliary temperature and the second current auxiliary temperature as an average auxiliary temperature,
the control unit controls the temperature difference value judgment unit to judge whether the difference value between the current processing temperature and the average auxiliary temperature is less than a predetermined temperature difference threshold value,
the drive control unit controls the airflow drive unit to reduce the drive force when the temperature difference determination unit determines that the temperature difference is negative.
8. The automatic particulate filter cleaning apparatus according to claim 3, wherein:
wherein the control device is also provided with a high temperature maintaining stage ending judging unit and a first cooling stage ending judging unit,
the control unit comprises an air inlet valve control part, an exhaust valve control part, a reflux valve control part, a heating control part and a driving control part,
the particulate filter cleaning apparatus further includes:
an exhaust unit for exhausting the high temperature air stream, having an exhaust valve for controlling the exhaust of the high temperature air stream,
an air flow returning unit for returning the high temperature air flow from the air flow output unit so that the high temperature air flow circulates, the air flow returning unit having a return valve for controlling the return of the high temperature air flow,
the predetermined heat treatment curve at least comprises a high temperature maintaining stage, a first temperature reduction stage and a second temperature reduction stage,
the temperature of the high-temperature air flow maintained in the high-temperature maintaining stage is 550-700 ℃, the duration of the high-temperature maintaining stage is 5-30 min,
the high temperature maintenance phase end judgment unit judges whether the current processing time reaches the end time of the high temperature maintenance phase,
when the high temperature maintaining stage ending judging unit judges that the temperature is higher than the preset temperature, the heating control part controls the heating unit to stop processing, the air inlet valve control part controls the air inlet valve to increase the opening degree,
the first cooling stage end judgment unit judges whether the current processing time reaches the end time of the first cooling stage,
when the first cooling stage end judgment unit judges that the judgment result is yes, the air inlet valve control part controls the air inlet valve to be completely opened, the exhaust valve control part controls the exhaust valve to be opened, and meanwhile, the backflow valve control part controls the backflow valve to be closed.
9. The automatic particulate filter cleaning apparatus according to claim 1, wherein:
wherein the control device further has a curve storage unit, a model input unit, and a heating curve determination unit,
the curve storage unit stores models of different particulate filters and heat treatment curves corresponding to the models,
the model input unit is used for an operator to input the model of the particle filter to be cleaned,
the heating curve determining unit determines a corresponding heating processing curve from the curve storage unit according to the input model as the predetermined heating processing curve.
10. The automatic particulate filter cleaning apparatus according to claim 9, wherein:
wherein the control device also comprises a display unit and a picture storage unit,
the picture storage unit stores a temperature display picture,
when the heating curve determining unit determines the preset heating processing curve, the control unit controls the display unit to display the temperature display picture and the preset heating processing curve and display the current processing temperature in real time.
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